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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 2903 | * Filters the audio and video metadata fields to be shown in the publish meta box. |
| 2904 | * |
| 2905 | * The key for each item in the array should correspond to an attachment |
| 2906 | * metadata key, and the value should be the desired label. |
| 2907 | * |
| 2908 | * @since 3.7.0 |
| 2909 | * |
| 2910 | * @param array $fields An array of the attachment metadata keys and labels. |
| 2911 | */ |
| 2912 | $fields = apply_filters( 'media_submitbox_misc_sections', array( |
| 2913 | 'length_formatted' => __( 'Length:' ), |
| 2914 | 'bitrate' => __( 'Bitrate:' ), |
| 2915 | ) ); |
| 2916 | |
| 2917 | foreach ( $fields as $key => $label ) { |
| 2918 | if ( empty( $meta[ $key ] ) ) { |
| 2919 | continue; |
| 2920 | } |
| 2921 | ?> |